全钢载重子午线轮胎胎圈露线的原因分析及解决措施

从产品设计和工艺控制方面分析全钢载重子午线轮胎胎圈露线的原因,并提出相应的解决措施。通过适当增大成型平面宽和鼓肩宽,适当减小钢丝圈内侧胎侧厚度和胎趾角度,严格控制胎侧成型定位、胎坯存放、硫化机机械手精度、钢丝圈缠绕工艺及存放等措施,有效地解决了全钢载重子午线轮胎胎圈露线问题,提高了轮胎的安全性能,降低了生产成本。     

全钢载重子午线轮胎成型机的改造

对全钢载重子午线轮胎成型机中存在的超声波裁刀运行不稳定、胎圈补强带贴合定位装置精度低、带束层定长装置不稳定和钢丝圈撞帘布的问题进行原因分析并采取相应解决措施.成型机改造后,全钢载重子午线轮胎的产量和质量均得到较大提高,且设备运行更加平稳.     

全钢载重子午线轮胎胎圈质量缺陷的原因分析及解决措施

分析全钢载重子午线轮胎胎圈部位裂口、露线、缺胶、变形、气泡、胶边、钢丝圈上抽和胎趾圆角等质量缺陷的产生原因,并提出相应解决措施。通过采取合理设计半成品尺寸、定期检查硫化机机械手的对中度、调整胎坯一次定型的停放高度、及时更换损坏的成型机反包胶囊、均匀喷涂硫化胶囊隔离剂及定期清理模具等措施,胎圈质量缺陷得到解决,成品合格率明显提高。     

硫化机精度对全钢载重子午线轮胎外观质量的影响及改善措施

研究硫化机精度对全钢载重子午线轮胎外观质量的影响,提出相应的改善措施。硫化机平行度、垂直度和同轴度精度不达标易导致成品轮胎出现胎圈大边、钢丝圈上抽和胎圈露线等外观缺陷,提高硫化机精度可以降低成品轮胎外观缺陷率。     

全钢载重子午线轮胎胎坯胎圈内径偏大的解决措施

探讨采用一次法成型的全钢载重子午线轮胎胎坯胎圈内径偏大的解决措施。钢丝圈底部增添胶片对胎坯胎圈内径有明显影响,胎圈宽度也增大,不能解决成品轮胎胎圈质量问题;成型机机头宽度调整对胎坯胎圈内径影响不大,对解决成品轮胎胎圈质量问题也无效;成型鼓撑块直径与胶囊厚度配合调整,可有效降低成品轮胎胎圈质量发生率。     

全钢载重子午线轮胎肩部帘线弯曲问题分析

分析全钢载重子午线轮胎肩部帘线弯曲的产生原因,并提出解决措施.肩部帘线弯曲的主要原因为技术参数设计时成型平宽、胎坯外周长和钢丝圈平面宽设置过大;压延过程中钢丝帘线张力设置不合理,胎面、胎肩垫胶或复合三角胶的口型板磨损,预硫化工艺波动导致钢丝圈硫化程度不足,成型机钢丝圈夹持器以及胎体鼓或定型鼓胎圈撑块定位不准或发生漂移,成型压力过小或压辊压力过大,胎坯存放过程中发生变形以及硫化定型压力过大.采取措施后,可以有效解决全钢载重子午线轮胎肩部帘线弯曲问题.     

全钢载重子午线轮胎质量缺陷产生原因及解决措施

从操作及工艺控制方面分析全钢载重子午线轮胎经常出现的胎里露线、胎圈露钢丝、胎体劈缝、胎里气泡、胎里窝气、胎趾圆角和胎侧欠硫外观质量缺陷的产生原因,并从设备改进、产品设计和工艺管理方面提出相应的解决措施.严格控制半成品尺寸、成型和硫化定型操作等可保证全钢载重子午线轮胎质量和生产效益.     

全钢载重子午线轮胎胎圈露线的产生原因及解决措施

对全钢载重子午线轮胎胎圈露线的产生原因进行了分析，并提出了相应的解决措施。半成品部件尺寸不合格、钢丝圈直径偏差较大、硫化模型钢菱圈尺寸不合适及变形、胎坯对中不好以及硫化工艺参散控制不当均可造成胎圈露线的外观缺陷。通过严格控制混炼及硫化工艺、按时检查钢丝圈缠绕法兰盘直径和压延厚度、铜丝圈直径、铜菱圈高度与胎坯匹配情况以及机械手对中情况等措施，可有效减少胎圈露线的发生。     

Φ1.83 mm HT胎圈钢丝在载重子午线轮胎中的应用

试验研究Φ1.83 mm HT胎圈钢丝在全钢载重子午线轮胎中的应用.结果表明,以Φ1.83 mm HT胎圈钢丝替代Φ1.65 mm NT胎圈钢丝用于全钢载重子午线轮胎钢丝圈,可在保证成品轮胎性能的基础上,提高生产效率,降低生产成本.     

Ф1．83mill HT胎圈钢丝在载重子午线轮胎中的应用

试验研究Ф1．83mmHT胎圈钢丝在全钢载重子午线轮胎中的应用。结果表明,以Ф1．83mmHT胎圈钢丝替代Ф1．65mm NT胎圈钢丝用于全钢载重子午线轮胎钢丝圈,可在保证成品轮胎性能的基础上,提高生产效率,降低生产成本。     

乙苯,苯乙烯的生产及合成乙苯,苯乙烯催化剂的研究进展

苯乙烯是重要的石油化工原料。本文介绍了国内外苯乙烯生产的发展概况，合成乙苯，苯乙烯所用的催化剂种类，并就苯乙烯生产及催化剂的发展趋势提出了自己的观点。     

Synthesis and characterization of homopolymers and copolymers of various acrylates and acrylonitrile

Various homopolymers and copolymers of methyl acrylate, ethyl acrylate, butyl acrylate, and acrylonitrile in different feed ratios were synthesized. These were characterized by IR, ¹³C-NMR, DSC, DTA, and TGA. Spectroscopic characterization helped in differentiating copolymers of different mol ratios. Thermal analysis revealed different degradation patterns for homopolymers and copolymers. The temperature and energy changes associated with various phase transitions were dependent on the chemical composition of homo- and copolymers, as expected. © 1993 John Wiley & Sons, Inc.     

生物质气化及生物质与煤共气化技术的研发与应用

总结了生物质原料的特点及生物质单独气化的缺点;介绍了国内外生物质气化技术及生物质与煤共气化技术的研发与应用现状;分析了在此领域国内外的发展趋势与前景;概括了开展生物质与煤共气化技术研发的意义。     

Electronic structures and reactivities of monometallic and bimetallic clusters of Au and Cu

The variation of the Au 4f binding energy of Au clusters with the cluster size has been established by measuring the binding energies of clusters whose size distributions were independently determined by HREM and STM. The binding energy increases significantly when the cluster size is less than 2 nm. Au-Cu bimetallic clusters of the composition Cu₃Au have been deposited for the first time on carbon substrates. The shifts in the core level binding energies of the bimetallic clusters show the effect of alloying in the case of large clusters, but show effects of both alloying and cluster size in the case of the small clusters. The interaction of CO with Cu₃Au clusters is stronger than with a bulk Cu metal. The interaction of CO with small Cu clusters also seems to be stronger than with bulk Cu or with large Cu clusters.     

钾盐资源及钾肥供需情况分析及预测

阐述了国内外钾盐资源及钾肥生产现状,对国内外钾盐的供需形势进行了分析及预测,从资源、原材料、国际市场三方面提出了解决我国钾盐短缺的措施。     

Kinetics and Mechanism of Oxidation of Mono- and Polyacetals

Abstract

Kinetics and mechanisms of oxidation of 6 acetals by molecular oxygen and ozone in liquid phase have been studied. Reaction with molecular oxygen (70°C, 15–16 hr) leads to the formation monoethers of the corresponding glycols with 68–90% selectivity. Salts of metals and complexes with crown-ethers have increased the reaction rate significally. Ozone have reacted with acetals with formation similar products. The mechanisms of intermediate stages have been proposed.     

Comparison of the Adhesion and Cohesion of Triblock and Random Copolymers of Styrene and Butadiene

A substantially greater detachment energy is required to strip a polyethylene tereph-thalate (Mylar) film from a styrene-butadiene-styrene (SBS) triblock copolymer compared to that for peeling from a random styrene-butadiene (SBR) copolymer. This is true even though the intrinsic interaction between the Mylar and each elastomer is expected to be similar because of their virtually identical chemical composition. It is proposed that this difference in peel strength (between the SBS and SBR) is a consequence of the much higher dissipative capacity of the former elastomer. Another manifestation of this is the higher cohesive tear strength of the SBS compared to the SBR. Extents of energy dissipation within each elastomer during detachment of the Mylar adherend are consistent with the hypothesis that the average maximum stress experience before detachment is some similar fraction of each elastomer's tensile strength.     

Wetting properties of homopolymers and copolymers of pentafluorostyrene and methylacrylate and homopolymer blends

Polypentafluorostyrene (PPFS), polymethylacrylate (PMA), and poly(pentafluorostyrene-co-methylacrylate), poly(PFS-co-MA) were prepared and the wetting characteristics of polymer blends of PPFS and PMA were compared with that of poly(PFS-co-MA) via contact angle measurements. The critical surface tension of polypentafluorostyrene was found to be 22.6 dyne/cm, which is comparable to the value reported for polytrifluoroethylene (22 dyne/cm). The critical surface tension of poly(PFS-co-MA) is not linearly related to its composition. The polymer blends of PPFS and PMA exhibit significant surface enrichment of the fluoropolymer. The harmonic-mean method¹ was employed to determine surface tensions of these polymers and many known polymers. It is found that the method produces useful surface tension data provided the contact angle values are derived from testing liquids of dissimilar polarity.     

实施水泵节能技改 实现节能降耗

介绍了内蒙古亿利化学工业有限公司在满足生产的前提下,对现有的循环水泵实施的节能技改及效果。     

责任和责任心的涵义与结构

责任是人应主动承担的角色义务和对其因过失所造成后果应承担的责罚.有两层涵义:一是义务;二是后果.责任心是个体自觉做好分内事务和履行道德义务的心理倾向,是个性心理品质成分中自我特征维度上的重要内容.责任心具有两个方面的涵义:一是角色分内职责;二是角色道德义务.责任心是一种通过责任认知、责任个性和责任适应的动态形式表现出来的静态品质,责任心是责任心过程结构与责任心关系结构相互制约、相互影响的统一体.